Cement-block mold.



A. H. WEISSER.

CEMENT BLOCK MOLD.

APPLICATION FILED JUNE 26. 1916.

Patented Oct. 24, 1916.

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Arm/115V WEISSER CEMENT BLOCK MOLD.

APPLICATION FILED JUNE 26. 19I6.

Patented Oct. 24, 1916.

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ARTHUR H. WEISSER, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO GUY E.MURPHY, OF DETROIT, MICHIGAN.

CEMENT-BLOCK MOLD.

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Application filed. June 26, 1916.

To all whom it may concern:

Be it known that I, ARTHUR H. "Wnissnn, a citizen of the United States,residing at Detroit, inthe county of Wayne and State of Michigan, haveinvented a new and useful Cement-Block Mold, of which the following is aspecification.

This invention relates to molds for cement blocks, and consists in thenovel features-of construction and operation of parts as hereinafter setforth and claimed.

The object of the invention is to provide a mold of simple constructionfor use in forming blocks of cementitious material for buildingpurposes, in which field stones or boulders of varying shapes and sizesmay be embedded to project from the face of the block in a manner toproduce an effect, when laid up, similar to that of a cobble stone wall,and wherein the wall of the mold forming the face of the block isrendered self-conforming to the irregular surfaces of the protrudingportions of the stones in a manner to establish a definite parting lineabout the projecting portions of the stones irrespective of their sizeor shape and to effect the required projection thereof upon the face ofthe block; to provide for the ready discharge of the block from the moldin its finished form, and to enable the successive molding of stone embedded blocks of varying face formations within a single mold.

In attaining the above object, the invention contemplates the employmentin connection with a suitable flask or mold in which the stones areplaced preparatory to being embedded in cement in the operation ofmolding the block, of a chambered wall for the face of the mold'adaptedfor connection with a source of water pressure and having a flexibleinner wall or diaphragm for supporting the face of the block to bemolded, which is caused by the pressure of water admitted to the chamberto distend between and conform with and embrace the adjacent portions ofthe stones within the flask, thus forming a pliable match wall forestablishing a parting line bisecting the projecting portions of thestones and which will resist the pressure of the cement when forced intothe mold to embed the stones in a manner to form the face of the blockwith the exposed portions of the stones in relief thereon.

Specification of Letters Patent.

Patented @ct. 2 f, 1%16.

Serial No. 105,798.

In the accompanying drawings, a preferred embodiment of the essentialfeatures of the which,

Figure 1 is a perspective view of the mold set up as in the operation ofmolding the block. Fig. 2 is a transverse vertical sec tional viewthrough the mold containing the block, taken on dotted line 2-2 ofFig. 1. Fig. 3 is a horizontal longitudinal section through the mold andblock, taken on dotted line 33 of Fig. 1. Fig. 4; is a perspective viewof the molded block.

Referring to the parts of the device by the characters of referencemarked on the drawings, as shown in Fig. 1, 1 designates the base plateof the mold upon the face of which is mounted two vertical end walls 2abutting at one end each against the face at opposite ends of a verticalside wall 3, and constituting three of the confining walls of the moldwhich is preferably rectangular in form. These walls may be removably orfixedly secured upon the base plate in any suitable manner to retainthem in position. A top plate 4: for closing the mold is provided atopposite ends with projecting studs 5 for engagement with latch levers 6pivoted to the end walls 2 of the mold to detachably secure said platethereon.

I The side of the mold for forming the finished or weather face of theblock, in which the stones are embedded in relief, consists of a hollowor recessed wall 7 having formed around its open side a laterallyprojecting flange 8, between the outer face of which and a binding frame9 the marginal edges of a flexible diaphragm 10, preferably of sheetrubber, is fixedly secured by bolts or screws 11 for binding the meetingparts together. By this means a closed chamber 12 is formed within thewall 7, of which the flexible diaphragm constitutes one of the walls andis adapted to flex and distend under the pressure of water admitted tosaid chamber, and to be sustained therebyagainst reflex action. Watermay be delivered to and discharged from the chamber 12 through 'anordinary two-way valve 18 connected by a nipple 14 with said chamber andcontrolling an outlet having a discharge pipe 15 and an inlet passagecommunicating with a feed pipe 16, the latter being adapted forconnectionv with a source of water supply under pressure (not shown).See Fig. 1.

invention is illustrated, and in The chambered wall 7 thus equipped ismounted upon the open face of the mold with the diaphragm 10 positionedto serve as an inner supplementary'flexible wall or partition extendingbetween and dividing the chamber 12 from the interior of the mold, andis detachably secured thereon by means of tie-rods 17. Each of theserods, of which there is one at each end of the mold, is pivotallyconnected to swing at one end on an eye-bolt. 18 which extends throughthe binding frame 9 and flange 8 of the chambered wall 7 and is anchoredtherein by a nut 19. The opposite ends of these rods are receivedrespectively in forked extensions 20 formed on the ends of the wall 3and are provided with eccentric levers 21 pivoted to swing intoengagement with said extensions to exert tension longitudinally on saidrods and draw the frame 9 of the chambered wall 7 into close fittingcontact with the engaging edges of the walls of the mold about the openface thereof. (See Fig.

When the parts of the mold are assembled in the abovemanner, and beforethe top plate 1 is placed in position, the stones, as indicated at 22,to be embedded in the block to be molded, may be placed within the moldand distributed therein as may be desired, care being required only toposition such stones as are to :be embodied in the weather face of theblock in line adjacent the inner face of the diaphragm and to supportthese stones against inward displacement by interposing or filling instones between them and the walls of the mold. Water under pressure isthen admitted through the valve 13 to-the chamber 12, and the pressureexerted thereby upon the flexible partition 01'' diaphragm 10 causes itto distend between and collapse upon and embrace portions of the bodiesof the adjacent stones, as shown in Figs. 2 and 3.

The extent of the deflection of the diaphragm and the consequentprojection of the stones upon the face of the block'may be regulated bythe pressure of the Water admitted to the chamber, and when this hasbeen determined the top plate l of the mold is placed in position andsecured by the latch levers 6, when the mold will be ready to receivethe cement or other plastic material for embodying the stones andforming the block.

As a means for introducing the cement under pressure into the mold toinsure its distribution about the stones and against thewalls thereof,and also to provide for coring out portions of the body of the block,cylindrical spouts or hollow cores 23 are inserted through close fittingapertures in the top plate 4 and rest at their lower ends within. themold upon the base plate 1. These hollow cores may be connected bybranches 24 with a feed pipe 25 through which the cement mixture in aplastic state is delivered to said cores, and each of the cores isprovided with a plunger head 26 having a handle 27 by which it may bereciprocated to tamp or force the plastic cement into the mold. The sidewalls of the cores near their lower ends are provided with a series ofelongated outlet apertures 28, at the bottom of which the core is closedby a head 29 having inwardly extending opposed inclined walls 30 whichdirect the discharge of the cement in opposite directions through saidapertures, and assists in distributing it uniformly about the stones andwalls throughout the mold. The flexible wall or diaphragm beingsustained by the water pressure, which is practically non-compressible,will maintain a tight joint about the embraced portions of the stones,preventing the cement from entering therebetween.

When the mold has been filled, the cores may be withdrawn and theportions of coment remaining in the outlet apertures 28 will be shearedoil by the walls of the core at the bottom of said apertures, leavingcored openings 31 through the body of the block 32 when formed, as shownin Fig. 4c. The flexible diaphragm, when relieved of pressure by thedischarge of the water through the outlet of the valve, will readilyreflex, owing to its elasticity, and withdraw from the face of theblock, leaving the engaged portions of the stones in relief thereon. Bydisengaging the eccentric levers the chambered wall may be removedfromthe mold, and upon releasing the latch levers and removing the topplate the finished block as shown in Fig. 4 may be discharged from themold.

It is obvious that the chambered wall carrying the flexible diaphragmmay be employed to constituteone or more of the confining walls of themold, as may be desired, to enable the molding of blocks with as manycorresponding stone exposed faces, and the invention is presented asincluding all such modifications and changes in the structural featuresas properly come within the scope and meaning of the following claims.

I claim:

1. A mold of the class described, comprising a mold body composed ofinclosing walls, a chamber in one of said walls, a flexible diaphragmdividing said chamber from the interior of said mold, means foradmitting fluid pressure to said chamber to flex and support saiddiaphragm, and means for admitting plastic material to the interior ofsaid mold.

2. A mold of the class described comprising a mold body composed ofconfining walls and open upon one side thereof, a chambered wall forclosing the open side of said mold body, a flexible dividing partitioninterposed between the open side of said mold body and said chamberedwall and closing the chamber therein, means for admitting hydraulicpressure to said chamber to flex and sustain said diaphragm, and meansfor introducing plastic material to the interior of said mold.

3. A mold of the class described comprising a hollow mold body having anopening therein, a chambered wall having a flexible diaphragm securedthereto and closing the chamber therein, means for detachably securingsaid diaphragm over the opening in the body of said mold, means foradmitting fluid pressure to said chamber to distend and support saiddiaphragm, and means for introducing plastic material under pressure tothe interior of said mold. 4. A mold of the class described comprising acasing having an opening in the side wall thereof, a recessed wall forclosing said opening, a flexible diaphragm secured over the recess insaid wall and forming the inclosing wall of a chamber therein, clampingmeans engageable with said recessed wall and with said casing forsecuring said diaphragm thereon over said opening, a valve controlledfluid pressure inlet and outlet passage communicating with said chamber,and an inlet opening in said casing to admit plastic material to theinterior thereof.

5. A mold of the class described comprising inclosing walls forming acasing having an aperture therein, a hollow core removably insertible atone end through said aperture into said casing, a recess in the innerwall of said casing, a flexible diaphragm extending over said recess andforming a closed chamber therein, means for delivering fluid pressure toand from said chamber to support and release said diaphragm, and meansfor feeding plastic material through said hollow core to the interior ofsaid casing.

6. In a mold for forming cement blocks having stones embedded in theface thereof, an open casing for containing the stones, a closure forsaid casing, a flexible diaphragm dividing the interior of said casingand forming a closed chamber upon one side thereof, means for admittingfluid pressure to said chamber to collapse said diaphragm upon adjacentportions of said stones within the casing, and means for introducingplastic material under pressure to embed the remaining portions of saidstones within said casing.

In testimony whereof I sign this specification.

ARTHUR H. WEISSER.

flopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents. Washington, D. G.

